package com.he.springbootdata.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;
import java.util.Map;

@RestController
public class JdbcController {

    @Autowired
    JdbcTemplate jdbcTemplate;

    //查询数据库的所有信息
    //没有实体类，数据库中的东西怎么获取？ 万能Map
    @GetMapping("/userList")
    public List<Map<String,Object>> userList(){
        String sql = "select * from mybatis.student";
        List<Map<String, Object>> list_maps = jdbcTemplate.queryForList(sql);
        return  list_maps;
    }

    @GetMapping("/addUser")
    public String addUser(){
        String sql = "insert into mybatis.teacher(id,name) values (2,'何老师')";
        jdbcTemplate.update(sql);
        return "ok";

    }

    @GetMapping("/deleteUser/{id}")
    public String deleteUser(@PathVariable("id")int id){
        String sql = "delete from mybatis.teacher where id =?";
        jdbcTemplate.update(sql,id);
        return "delete-ok";
    }


    @GetMapping("/updateUser/{id}")
    public String updateUser(@PathVariable("id")int id){
        String sql = "update mybatis.teacher set name=? where id = "+id;
        Object[] objects = new Object[1];
        objects[0]="周璐";
        jdbcTemplate.update(sql,objects);
        return "update-ok";
    }
}
